Excellent for the money - TacFire Same Plane Top Mounted Deployable Iron Sight

These are great, economical, polymer BUSs. The near sight has a flip-up reticle for more precise aiming. These fit Picatinny rails, but you have to slide them from the end of the rail to wherever you plan to seat them because the side does not detach. This means, you must take everything off your top rail to install or remove them. Flip up is easy. Whereas the MAGPUL MBUS you push down on the base to pop the sights up, with the Tacfires you push forward toward the end of the barrel. Easy to deploy. Accurate for fixed sights. The price is fantastic, as you can outfit 4 rifles with Tacfire at the price of one MAGPUL BUS set, and the effect is nearly identical. Cowitnesses perfectly out of the box with my Bushnell Tac Optics Big D Red Dot.